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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/task_scheduler/sequence.h" |
| 6 |
| 7 #include "base/macros.h" |
| 8 #include "base/time/time.h" |
| 9 #include "testing/gtest/include/gtest/gtest.h" |
| 10 |
| 11 namespace base { |
| 12 namespace internal { |
| 13 |
| 14 namespace { |
| 15 |
| 16 class TaskSchedulerSequenceTest : public testing::Test { |
| 17 public: |
| 18 TaskSchedulerSequenceTest() |
| 19 : task_a_owned_( |
| 20 new Task(FROM_HERE, |
| 21 Closure(), |
| 22 TaskTraits().WithPriority(TaskPriority::BACKGROUND))), |
| 23 task_b_owned_( |
| 24 new Task(FROM_HERE, |
| 25 Closure(), |
| 26 TaskTraits().WithPriority(TaskPriority::USER_VISIBLE))), |
| 27 task_c_owned_( |
| 28 new Task(FROM_HERE, |
| 29 Closure(), |
| 30 TaskTraits().WithPriority(TaskPriority::USER_BLOCKING))), |
| 31 task_d_owned_( |
| 32 new Task(FROM_HERE, |
| 33 Closure(), |
| 34 TaskTraits().WithPriority(TaskPriority::USER_BLOCKING))), |
| 35 task_e_owned_( |
| 36 new Task(FROM_HERE, |
| 37 Closure(), |
| 38 TaskTraits().WithPriority(TaskPriority::BACKGROUND))), |
| 39 task_a_(task_a_owned_.get()), |
| 40 task_b_(task_b_owned_.get()), |
| 41 task_c_(task_c_owned_.get()), |
| 42 task_d_(task_d_owned_.get()), |
| 43 task_e_(task_e_owned_.get()) {} |
| 44 |
| 45 protected: |
| 46 // Tasks to be handed off to a Sequence for testing. |
| 47 scoped_ptr<Task> task_a_owned_; |
| 48 scoped_ptr<Task> task_b_owned_; |
| 49 scoped_ptr<Task> task_c_owned_; |
| 50 scoped_ptr<Task> task_d_owned_; |
| 51 scoped_ptr<Task> task_e_owned_; |
| 52 |
| 53 // Raw pointers to those same tasks for verification. This is needed because |
| 54 // the scoped_ptrs above no longer point to the tasks once they have been |
| 55 // moved into a Sequence. |
| 56 const Task* task_a_; |
| 57 const Task* task_b_; |
| 58 const Task* task_c_; |
| 59 const Task* task_d_; |
| 60 const Task* task_e_; |
| 61 |
| 62 private: |
| 63 DISALLOW_COPY_AND_ASSIGN(TaskSchedulerSequenceTest); |
| 64 }; |
| 65 |
| 66 void ExpectSortKey(TaskPriority expected_priority, |
| 67 TimeTicks expected_sequenced_time, |
| 68 const SequenceSortKey& actual_sort_key) { |
| 69 EXPECT_EQ(expected_priority, actual_sort_key.priority); |
| 70 EXPECT_EQ(expected_sequenced_time, actual_sort_key.next_task_sequenced_time); |
| 71 } |
| 72 |
| 73 } // namespace |
| 74 |
| 75 TEST_F(TaskSchedulerSequenceTest, PushPopPeek) { |
| 76 scoped_refptr<Sequence> sequence(new Sequence); |
| 77 |
| 78 // Push task A in the sequence. Its sequenced time should be updated and it |
| 79 // should be in front of the sequence. |
| 80 EXPECT_TRUE(sequence->PushTask(std::move(task_a_owned_))); |
| 81 EXPECT_FALSE(task_a_->sequenced_time.is_null()); |
| 82 EXPECT_EQ(task_a_, sequence->PeekTask()); |
| 83 |
| 84 // Push task B, C and D in the sequence. Their sequenced time should be |
| 85 // updated and task A should always remain in front of the sequence. |
| 86 EXPECT_FALSE(sequence->PushTask(std::move(task_b_owned_))); |
| 87 EXPECT_FALSE(task_b_->sequenced_time.is_null()); |
| 88 EXPECT_EQ(task_a_, sequence->PeekTask()); |
| 89 |
| 90 EXPECT_FALSE(sequence->PushTask(std::move(task_c_owned_))); |
| 91 EXPECT_FALSE(task_c_->sequenced_time.is_null()); |
| 92 EXPECT_EQ(task_a_, sequence->PeekTask()); |
| 93 |
| 94 EXPECT_FALSE(sequence->PushTask(std::move(task_d_owned_))); |
| 95 EXPECT_FALSE(task_d_->sequenced_time.is_null()); |
| 96 EXPECT_EQ(task_a_, sequence->PeekTask()); |
| 97 |
| 98 // Pop task A. Task B should now be in front. |
| 99 EXPECT_FALSE(sequence->PopTask()); |
| 100 EXPECT_EQ(task_b_, sequence->PeekTask()); |
| 101 |
| 102 // Pop task B. Task C should now be in front. |
| 103 EXPECT_FALSE(sequence->PopTask()); |
| 104 EXPECT_EQ(task_c_, sequence->PeekTask()); |
| 105 |
| 106 // Pop task C. Task D should now be in front. |
| 107 EXPECT_FALSE(sequence->PopTask()); |
| 108 EXPECT_EQ(task_d_, sequence->PeekTask()); |
| 109 |
| 110 // Push task E in the sequence. Its sequenced time should be updated and |
| 111 // task D should remain in front. |
| 112 EXPECT_FALSE(sequence->PushTask(std::move(task_e_owned_))); |
| 113 EXPECT_FALSE(task_e_->sequenced_time.is_null()); |
| 114 EXPECT_EQ(task_d_, sequence->PeekTask()); |
| 115 |
| 116 // Pop task D. Task E should now be in front. |
| 117 EXPECT_FALSE(sequence->PopTask()); |
| 118 EXPECT_EQ(task_e_, sequence->PeekTask()); |
| 119 |
| 120 // Pop task E. The sequence should now be empty. |
| 121 EXPECT_TRUE(sequence->PopTask()); |
| 122 EXPECT_EQ(nullptr, sequence->PeekTask()); |
| 123 } |
| 124 |
| 125 TEST_F(TaskSchedulerSequenceTest, GetSortKey) { |
| 126 scoped_refptr<Sequence> sequence(new Sequence); |
| 127 |
| 128 // Push task A in the sequence. The highest priority is from task A |
| 129 // (BACKGROUND). Task A is in front of the sequence. |
| 130 sequence->PushTask(std::move(task_a_owned_)); |
| 131 ExpectSortKey(TaskPriority::BACKGROUND, task_a_->sequenced_time, |
| 132 sequence->GetSortKey()); |
| 133 |
| 134 // Push task B in the sequence. The highest priority is from task B |
| 135 // (USER_VISIBLE). Task A is still in front of the sequence. |
| 136 sequence->PushTask(std::move(task_b_owned_)); |
| 137 ExpectSortKey(TaskPriority::USER_VISIBLE, task_a_->sequenced_time, |
| 138 sequence->GetSortKey()); |
| 139 |
| 140 // Push task C in the sequence. The highest priority is from task C |
| 141 // (USER_BLOCKING). Task A is still in front of the sequence. |
| 142 sequence->PushTask(std::move(task_c_owned_)); |
| 143 ExpectSortKey(TaskPriority::USER_BLOCKING, task_a_->sequenced_time, |
| 144 sequence->GetSortKey()); |
| 145 |
| 146 // Push task D in the sequence. The highest priority is from tasks C/D |
| 147 // (USER_BLOCKING). Task A is still in front of the sequence. |
| 148 sequence->PushTask(std::move(task_d_owned_)); |
| 149 ExpectSortKey(TaskPriority::USER_BLOCKING, task_a_->sequenced_time, |
| 150 sequence->GetSortKey()); |
| 151 |
| 152 // Pop task A. The highest priority is still USER_BLOCKING. The task in front |
| 153 // of the sequence is now task B. |
| 154 sequence->PopTask(); |
| 155 ExpectSortKey(TaskPriority::USER_BLOCKING, task_b_->sequenced_time, |
| 156 sequence->GetSortKey()); |
| 157 |
| 158 // Pop task B. The highest priority is still USER_BLOCKING. The task in front |
| 159 // of the sequence is now task C. |
| 160 sequence->PopTask(); |
| 161 ExpectSortKey(TaskPriority::USER_BLOCKING, task_c_->sequenced_time, |
| 162 sequence->GetSortKey()); |
| 163 |
| 164 // Pop task C. The highest priority is still USER_BLOCKING. The task in front |
| 165 // of the sequence is now task D. |
| 166 sequence->PopTask(); |
| 167 ExpectSortKey(TaskPriority::USER_BLOCKING, task_d_->sequenced_time, |
| 168 sequence->GetSortKey()); |
| 169 |
| 170 // Push task E in the sequence. The highest priority is still USER_BLOCKING. |
| 171 // The task in front of the sequence is still task D. |
| 172 sequence->PushTask(std::move(task_e_owned_)); |
| 173 ExpectSortKey(TaskPriority::USER_BLOCKING, task_d_->sequenced_time, |
| 174 sequence->GetSortKey()); |
| 175 |
| 176 // Pop task D. The highest priority is now from task E (BACKGROUND). The |
| 177 // task in front of the sequence is now task E. |
| 178 sequence->PopTask(); |
| 179 ExpectSortKey(TaskPriority::BACKGROUND, task_e_->sequenced_time, |
| 180 sequence->GetSortKey()); |
| 181 } |
| 182 |
| 183 } // namespace internal |
| 184 } // namespace base |
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